My car has this idle problem. When I start the car cold, it idles at 1500 rpm solid..But it wont come down for a long time unless i start driving it. Then it idles at 600 rpm..The temperature gauge shows that it's fully warmed up around 10 min..It takes around 30~40 min to come down on its own..what's going on here?

Any help would be greatly appreciated.

 

I fixed that problem on my car by cleaning and lubricating the whole throttle body assembly, especially around the throttle assemblies...


Rat

 

Yeah. Try cleaning/lubricating the TB, if you let it warm up then blip the throttle a few times does it drop?

 

mine kinda does the same thing, sometimes it idles at like 1200, when it's "set" to idle at like 650 or 700.. I have to let the clutch out in 1st gear at a stoplight to get it back under 1k, then it idles fine

 

mine has kinda if the same problem it won't idle under 1200rpm but if you have it in gear and let the clutch pedal go slow and get it down to like 700 it will want to die and it will stay there but it will want to die then you have to hit the gas to bring the rpms back up

 

another thing, there is a throttle damper behind TB on the firewall side. Remove that and see if your problems continue.